<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">

      <div class="title-container">
        <h3 class="title">
          <img src="@/assets/common/login-logo.png" alt="">
        </h3>
      </div>
      <!-- 四步
        1. el-form :model
        2. el-input v-model
        3. el-form :rules
        4. input所在的item prop
       -->
      <el-form-item prop="mobile">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="mobile"
          v-model="loginForm.mobile"
          placeholder="请输入手机号"
          name="mobile"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="请输入密码"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>
      <!-- native 修饰符后面补充 -->
      <el-button :loading="loading" class="loginBtn" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录</el-button>

      <div class="tips">
        {{ $store.state.user.token }}--
        {{ $store.getters.token }}
        <span style="margin-right:20px;">账号: 13800000001/2/3/4</span>
        <span> 密码: 123456</span>
      </div>

    </el-form>
  </div>
</template>

<script>

export default {
  name: 'Login',
  data() {
    return {
      // 表单关联的数据
      loginForm: {
        mobile: '13800000003',
        password: '123456'
      },
      // 表单校验规则
      loginRules: {
        mobile: [
          { required: true, trigger: ['blur', 'change'], message: '手机号不能为空' },
          { pattern: /^1[3-9]\d{9}$/, trigger: ['blur', 'change'], message: '手机号格式不正确' }
        ],
        password: [
          { required: true, trigger: ['blur', 'change'], message: '密码不能为空' },
          { min: 6, max: 16, trigger: ['blur', 'change'], message: '密码长度要在6-16位' }
        ]
      },
      loading: false, // 控制登录按钮的加载效果
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    // 登录功能
    handleLogin() {
      // 1. 表单的预校验
      this.$refs.loginForm.validate(async valid => {
        // 2.预校验通过后
        if (valid) {
          // 3. 按钮开启loading效果
          this.loading = true
          // reqLogin(this.loginForm).then(res => {
          //   console.log(res)
          // })
          // 4. 触发action发送登录请求
          /* this.$store.dispatch('user/login', this.loginForm).then(res => {
            // console.log(res)
            // 有token跳转到首页 平彦超同学的解决方案
            // this.$store.getters.token && this.$router.push('/')
            // 我的解决方案
            this.$router.push('/')
          }).finally(() => { // 不论登录成功还是登录失败, 总要让按钮能被下次点击
            this.loading = false
          }) */
          // then是成功后执行, catch是失败执行,finally不论成功还是失败最后都会执行finally
          // async是用户来修饰函数为一个异步函数, await后一般跟的是一个promise对象, 可以拿到promise.then的结果
          // async+await是来简化promise操作的
          try { // 试着去执行登录的操作
            const data = await this.$store.dispatch('user/login', this.loginForm)
            console.log(data)
            // // 跳转到首页
            this.$router.push('/')
          } catch {
            console.log('失败了')
          }
          //  关闭loading
          this.loading = false
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">

.loginBtn {
  background: #407ffe;
  height: 64px;
  line-height: 32px;
  font-size: 24px;
}
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#407ffe;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.9); // 输入登录表单的背景色
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;
::v-deep .el-form-item__error {
    color: #fff !important;
    font-size: 14px;
 }
.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;
  background-image: url('~@/assets/common/login.jpg'); // 设置背景图片
  background-position: center; // 将图片位置设置为充满整个屏幕

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
